A 16-bit integer can store 216 (or 65536) unique values. In an unsigned representation, these values are the integers between 0 and 65535; using two's complement, possible values range from -32768 to 32767.
MSDOS, DRDOS, PCDOS, FreeDOS, OpenDOS, PTSDOS, Windows v3.1, WFWG, or other 16bit OS users will find advice, information, and links to free downloads at this website for users of the 8088, 8086, 80286, 80386, and newer Intel platform hardware when booting up any version of MSDOS, DR-DOS, FreeDOS, OpenDOS, PCDOS, PTSDOS, W31, or WFWG.
This website even has links to a free download of a CPM v2.2 professionally written emulator, Free downloads of MINIX, mini-installs of Linux, and Knoppix the zero-install full-blown Debian based Linux that executes entirely from a compressed CD image using a ram drive.
16Bit DOS and W31 are not limited to legacy systems.